Reminder glitch started on Memorial Day Holiday

I don't know what happened or why but something glitched over Memorial Day Weekend. Since then all my reminder notices have gone haywaire. Some work and some don't, even though they are still set, one show worked one day and then not the next. There doesn't seem to be any rhyme or reason for it. I did a hard reboot on both the DVR and the HD box but it is still happening. Is this happening to anyone else? Any solutions?